01 -
Combine all the ingredients in a mixer bowl with a dough hook. Mix on low until the dough turns smooth. It should feel sticky—sticks to the bowl bottom but not its sides.
02 -
Put the dough in a lightly greased bowl, cover it up, and let it rest until it doubles in size—about an hour or two.
03 -
Lay a sheet of parchment paper over a baking tray and set aside.
04 -
Take the risen dough out of the bowl, split it into 8-12 even parts using a dough cutter or knife. Equal sizes help for uniform buns, but it's okay if they aren't perfect.
05 -
Make a ball with each piece by gently flattening the dough in your palm. Pull its edges towards the middle, pinch them together, and set it seam side down. Use your hand to roll it into a sphere with a circular motion.
06 -
Place the shaped balls on the prepared sheet, cover them loosely, and let them puff up for about 30 minutes to an hour.
07 -
Set the oven to 175°C to preheat. Beat together milk and egg for the egg wash. Brush it over the buns before putting them in the oven once risen.
08 -
Bake the buns on the middle rack for around 16 minutes. They won’t brown much because of the cocoa, so tap their underside; a hollow sound means they’re done. Cool completely on a wire rack.
09 -
While buns cool, whip heavy cream with cocoa powder, powdered sugar, and salt until medium-stiff peaks form. Keep it chilled until needed.
10 -
Once buns have cooled down, slice partly through the middle, leaving them attached. Fill them with whipped cream (a piping bag makes this easier). Smooth out any messiness with a spatula or knife.
11 -
Dust the buns lightly with powdered sugar before serving.